<template>
  <el-breadcrumb class="app-breadcrumb" separator="/">
    <transition-group name="breadcrumb">
      <el-breadcrumb-item v-for="(item, index) in levelList" :key="item.path">
        <span
          v-if="item.redirect === 'noRedirect' || index == levelList.length - 1"
          class="no-redirect"
          >{{ item.meta.title }}</span
        >
        <a v-else @click.prevent="handleLink(item)">{{ item.meta.title }}</a>
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script setup>
import { useRoute, useRouter } from "vue-router";
const route = useRoute();
const router = useRouter();
const levelList = ref([]);

function getBreadcrumb() {
  // only show routes with meta.title
  // console.log(route);
  let matched = route.matched.filter((item) => item.meta && item.meta.title);
  // console.log(matched);
  const first = matched[0];
  // 判断是否为首页
  // if (!isDashboard(first)) {
  //   matched = [{ path: "/index", meta: { title: "首页" } }].concat(matched);
  // }

  levelList.value = matched.filter(
    (item) => item.meta && item.meta.title && item.meta.breadcrumb !== false
  );
  levelList.value[matched.length - 1] = route;
}
function isDashboard(route) {
  const name = route && route.name;
  if (!name) {
    return false;
  }
  return name.trim() === "Index";
}
function handleLink(item) {
  const { redirect, path } = item;
  // console.log(item);
  if (redirect) {
    router.push(redirect);
    return;
  }
  router.push(path);
}

watchEffect(() => {
  // if you go to the redirect page, do not update the breadcrumbs
  if (route.path.startsWith("/redirect/")) {
    return;
  }
  getBreadcrumb();
});
// watch(
//   () => router.currentRoute.value.path,
//   (newValue, oldValue) => {
//     // if you go to the redirect page, do not update the breadcrumbs
//     if (route.path.startsWith("/redirect/")) {
//       return;
//     }
//     console.log(route);
//     console.log(router);
//     // console.log("watch", router.currentRoute.value);
//     getBreadcrumb();
//   },
//   { immediate: true }
// );
getBreadcrumb();
</script>

<style lang="scss" scoped>
.app-breadcrumb.el-breadcrumb {
  display: inline-block;
  font-size: 16px;
  line-height: 70px;
  margin-left: 8px;

  .no-redirect {
    color: #333333;
    cursor: text;
    font-size: 16px;
  }
}
</style>
